Question about 2003 GMC Yukon Denali
Replaced senson a couple of weeks back. Worked fine til today. Oil Gague stays just below 40 (mid Mark on Gague) When idleing shows lower
If the guage is unreliable and its the only one that is, may switch to an aftermarket separate oil pressure guage that mounts elsewhere and be done with the situation entirely..these run around 25 bucks and its time to install and it wont fail like electronic ones do...
Posted on Jan 15, 2013
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Posted on Jan 02, 2017
Your oil pressure sending unit may be damaged or wearing out. You need to get the pressure affirmed so that you don't destroy your engine, but if you get a new sending unit and the pressure returns to normal you should be good to go. Thats the cheapeast way to go is to get a new sending unit and change it out or you can get the pressure verified by a mechanic which will charge for labor and then you may have to get a new unit anyway so the cost of just swapping the unit is less than a mechanic and the results will yield the same information. If the new unit does not settle the issue then you have some delivery problem either with your pump or a blockage of some sort.
Posted on Sep 16, 2011
The oil pump is in the oil pan and needs to be dropped and being a 4WD you also need to drop the front axle pumpkin to remove the oil pan and replace all the gasket needed. Start with the easy and replace the oil pressure sending unit, it's on the back of the engine to the passenger side of the distributor. You can go to Auto Zone and pick up a new Oil sending unit, just make sure your get the right one, "Sending Unit" Looks the same are the oil pressure sensor but the unit reads the pressure, the other just signal a light to go on and off. It's an easy fix like replacing a spark plug.
Posted on Jun 29, 2009
GMC yukons are notorious for gauge malfunctions, there are recalls for some models
However, if you have recently changed your battery this problem can occur and will take some driving time 30 min-60 min for the computer to fully reset.
Posted on Jan 20, 2009
My Envoy does the same thing..Had the sender replaced last winter when it was doing it. Went all summer with perfect pressure and as soon as the outside temp hit <30 degrees the pressure is dropping again..Curious as to why every time the temp gets below 30 I keep having this issue. If I shut the car off and turn it right back on it jumps to normal stays for a while then drops, shut it off and right back on (no wait) goes back to normal...Only when cold outside.... Confused!
Posted on Jan 07, 2010
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